Borg an outlier as he could win at French /
Wimby but not US
Not too many players that have won RG, Wimb and USO in the same year. Even fewer who have won the Channel Slam and then gone onto win the USO in the same year.
And keep in mind, Borg would go the the USO and face hometown boys Connors and McEnroe on their home soil with the NY crowd behind them. Huge ask for Borg to pull that off imho.
Many modern fans do not realise that Grass was not a familiar surface for Borg. His training regimes leading into Wimbledon are the stuff of legend. Playing on Grass did not come naturally to him. Yet his work ethic allowed him to succeed on that surface. Borg believed Wimbledon was the World Championship of the sport so he focused all of his efforts to win that tournament. If the USO had been that important to him at the time, he may well have passed on Wimbledon in a couple of seasons and focused on the USO. But things were different back in the 1970s. Wimbledon was THE tournament to win.
Sampras never came close to achieving a similar a challenge. Fast HC is a lot closer to Grass than both of those are to Red Clay.
Laver was the most dominant player of his era by quite some way imho. And he was a lot more dominant than any other player of their own eras.
He made Sampras switch from a 2h to 1h so he could win Wimbledon.
He didn't MAKE Sampras do anything Sampras did not want to do.
Sampras's main goal was to win the Wimbledon Men't Singles Title. Sampras idolised the great Australian players of he 1950s and 1960s, in particular Emerson.
Sampras realised in order to have any decent chance of winning at Wimbledon, he would have to develop a decent backhand volley. It was only natural that having a decent SHBH groundie would help achieve that aim So he switched to a SHBH - he had quite a decent DHBH as a junior- in order to develop a world class BH volley. The rest is history.